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Our solar syatem was swirling mass of gas and dust
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The Earth began to form and grow by colliding with space debris.
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Methods of establishing the age of materials.
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Volcanoes emitted gas, forming an atmosphere.
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Ozone(o3) formed- protected organisms from harmful UV rays so they could exist on land.
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It took one-half billion years for Earth to form from a swirling mass of gases. Sometime after Earth formed, living organisms began to affect the atmosphere.
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So form of life started to photosynthesize.
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Earth started to appear just as much as it does today.
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O2 levels reached todays levels.
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Lives varied from a fraction to a second.
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He found that a type RNA found in unicellular eukaryotes is able to act as a chemical catalyst.
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Miler and Urey set up an experiment using Oparins hypothesis as a starting point.
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Fox has done extensive research on the ohysical structures that may have given rise to the first cells.
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Methods of establishing the age of materials include the techniques known as Radiometric Dating.
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She proposed that early prokaryotic cells may have developed a mutually beneficial relationship.
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revealed that the world wasteeming with tiny creatures
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noticed and described the different development forms of flies
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desighned an experiment to test the hypothesis of spontanius generations
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pasteur set up a prize winning experiment to set up objections on to spollanzis experiment
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they thought that the atmosphere contained ammonia
